Rihanna was forced to seek medical attention after being assaulted by a crazed fan.
The Stay singer was targeted in an unprovoked attack by a man, who hurled a bottle of Lucozade at her, while leaving exclusive London nightclub The Box with her model pal Cara Delevingne on Saturday night .
The force of the glass bottle caused the 24-year-old star to fall and cut open her knee.
Her bodyguard's leg was also said to have been injured as he attempted to catch her attacker, who allegedly shouted something about Rihanna's boyfriend Chris Brown before throwing the bottle at her.
The 23-year-old R&B star is still on supervised probation for beating her in 2009.
